Table 2 Definition of hypertensive disorders and endometriosis in the included studies

Brosens et al. 2007 [17]

Nulliparous and multiparous

Persistently raised blood pressure (140/90 mmHg) starting after the 20th week of gestation. Pre-eclampsia was defined as PIH with proteinuria (> 300 mg/24 h)

Laparoscopy

Berlac et al. 2017 [38]

Nulliparous and multiparous

International Classification of Diseases (ICD)-10 codes

women who underwent surgical interventions for their disease before pregnancy

Conti et al. 2015 [26]

Nulliparous and multiparous

Systolic blood pressure over 140 mmHg or diastolic blood pressure over 90 mmHg after 20 weeks of gestation. preeclampsia: hypertension developing after 20 weeks of gestation with proteinuria

pathology following surgical removal of the lesions

Epelboin et al. 2021 [42]

Nulliparous and multiparous

-

The diagnosis of endometriosis was recorded if reported in previous hospitalizations since 2008

Farland et al. 2019 [40]

Nulliparous and multiparous

self-report

Laparoscopy

Farland et al. 2022 [41]

Nulliparous and multiparous

ICD 9 and 10 codes

ICD9 and ICD10 codes

Gebremedhin et al. 2023 [35]

Nulliparous and multiparous

ICD-9/ICD-9-CM

ICD-9/10^th revision-Australian Modification)

Glavind et al. 2017 [39]

Nulliparous and multiparous

using the relevant ICD-8 and ICD-10 from the Danish National Patient Registry

laparoscopic surgery

Hadfield et al. (2009) [18]

Nuliparous and multiparous

The ICD-10 codes used to define

The ICD-10 codes used to define

Harada et al. (2016) [30]

Nuliparous and multiparous

as persistently raised blood pressure ≥ 140/90 mmHg, occurring after > 20 weeks

Preeclampsia with severe features was defined as severe blood pressure elevation and severe proteinuria

Questionnaire

Ibiebele et al. 2022 [36]

Nuliparous and multiparous

-

Australian modification (ICD10-AM)

Lin et al. 2015 [33]

Nulliparous—multiparous

Elevated blood pressure ≥ 140/90 mmHg after 20 weeks of gestation

Preeclampsia is gestational hypertension with proteinuria

confirmed histologically and visually at the surgical procedure

Liu et al. 2023 [6]

Nulliparous and multiparous

‘Hypertension in pregnancy’ was defined as a systolic blood pressure of ≥ 140 mmHg or a diastolic blood pressure of ≥ 90 mmHg. When measured with semiquantitative urine dipsticks, proteinuria of at least 1 + in the presence of hypertension, with no evidence of urinary tract infection, was considered significant

Diagnosis of endometriosis was done by laparoscopic examination, and the stage of endometriosis (was determined based on the revised American Society for Reproductive Medicine (rASRM) classification

Mekaru et al. 2013 [31]

Nulliparous and multiparous

-

laparoscopic evaluation

Miura et al. 2019 [32]

Nulliparous and multiparous

-

laparoscopy with histological confirmation

Pan et al. 2017 [10]

Nulliparous and multiparous

International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM)

Surgical assessment by laparoscopy or laparotomy

Saraswat et al. 2016 [37]

Nulliparous and multiparous

-

surgically confirmed

Stephansson et al. 2009 [16]

Nulliparous and multiparous

ICD-9 codes

-

Porpora et al. 2020 [27]

Nulliparous women

-

surgical/histological or clinical /instrumental diagnosis of endometriosis

Scala et al. 2019 [28]

Nulliparous and multiparous

Gestational hypertension and concomitant proteinuria

Ultrasonographic diagnosis of endometriosis

Uccella et al. 2019 [29]

Nulliparous women

-

Pervious surgery

Velez et al. 2022 [43]

Nulliparous and multiparous

-

surgery with a diagnosis code of International Classification of Diseases ICD 9–617 or ICD10-N80

Xie et al. 2023 [34]

Nulliparous and multiparous

Increase in blood pressure of ≥ 140/ 90 mmHg after 20 weeks of gestation. Preeclampsia is gestational hypertension with proteinuria

Histological examination